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In Situ Growth of CoP 3 /Carbon Polyhedron/CoO/NF Nanoarrays as Binder‐Free Anode for Lithium‐Ion Batteries with Enhanced Specific Capacity
Author(s) -
Du Yingjie,
Ma Wei,
Li Haibo
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201907468
Subject(s) - anode , materials science , current collector , electrode , lithium (medication) , nanotechnology , carbon fibers , chemical engineering , composite material , composite number , electrolyte , chemistry , medicine , engineering , endocrinology
Advanced functional materials enable lithium‐ion batteries to reach high specific capacity. To achieve this goal, nickel foam (NF), as current collector, is chosen to in situ form aligned nanoarrays composed of CoP 3 /carbon polyhedron (CP)/CoO. The CoO nanowire acts as bridge to link NF and CoP 3 /CP which not only reinforces the adhesion between active material and NF but also enhances the capacity of whole electrode. Besides, CoP 3 is evenly coupled with CP, which can effectively buffer the volume expansion of CoP 3 during the charge/discharge process. Moreover, the novel architecture of CoP 3 /CP/CoO/NF is beneficial to improve the electronic conductivity. As a result, the CoP 3 /CP/CoO/NF anode delivers an ultrahigh specific capacity of 1715 mAh g −1 at 0.5 A g −1 which can remain at 1150 mAh g −1 after 80 cycles, demonstrating the good durability. Thus, this work develops a facile strategy to design self‐supporting electrodes for an enhanced energy storage device.